fix: add respondTo to memo comparator and gate lookup to bot pubkeys

Two review fixes:

1. MessageRow.tsx: add prev.message.respondTo === next.message.respondTo
   to the React.memo comparator so the icon overlay updates when profiles
   load asynchronously.

2. ChannelScreen.tsx: only populate respondToLookup for pubkeys with
   role === "bot" in channel members. Prevents human users who publish
   respond_to in their kind:0 profile from incorrectly showing the icon.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/features/channels/ui/ChannelScreen.tsx

@@ -202,17 +202,17 @@ export function ChannelScreen({
     const pLookup = new Map<string, string>();
     const rLookup = new Map<string, RespondToMode>();
 
-    // Populate from profile data (works for all bots, including other users' bots).
+    const botPubkeys = new Set(
+      (channelMembers ?? [])
+        .filter((m) => m.role === "bot")
+        .map((m) => m.pubkey.toLowerCase()),
+    );
     const profiles = messageProfilesQuery.data?.profiles;
     if (profiles) {
       for (const [pubkey, profile] of Object.entries(profiles)) {
-        if (
-          profile.respondTo === "anyone" ||
-          profile.respondTo === "allowlist" ||
-          profile.respondTo === "owner-only"
-        ) {
-          rLookup.set(pubkey.toLowerCase(), profile.respondTo);
-        }
+        const key = pubkey.toLowerCase();
+        const rt = profile.respondTo as RespondToMode | null;
+        if (botPubkeys.has(key) && rt) rLookup.set(key, rt);
       }
     }
 
@@ -225,6 +225,7 @@ export function ChannelScreen({
     }
     return { personaLookup: pLookup, respondToLookup: rLookup };
   }, [
+    channelMembers,
     managedAgentsQuery.data,
     messageProfilesQuery.data?.profiles,
     personasQuery.data,

desktop/src/features/messages/ui/MessageRow.tsx

@@ -391,6 +391,7 @@ export const MessageRow = React.memo(
     prev.message.tags === next.message.tags &&
     prev.message.role === next.message.role &&
     prev.message.personaDisplayName === next.message.personaDisplayName &&
+    prev.message.respondTo === next.message.respondTo &&
     prev.highlighted === next.highlighted &&
     prev.activeReplyTargetId === next.activeReplyTargetId &&
     prev.layoutVariant === next.layoutVariant &&